Mokka and integration of the geometry AIDA kick-off meeting WP2 session: Common software tools 17 February 2011 – CERN Paulo Mora de Freitas and Gabriel Musat Ecole polytechnique

Paulo Mora de Freitas2 Mokka detectors Mokka Geometry Database Geometry drivers

Paulo Mora de Freitas3 Mokka’s kernel framework Mokka Kernel Geant4 Geometry Drivers Geometry Database

Paulo Mora de Freitas4 The detector models in DB  A model = a set of sub detectors (TPC, Ecal, Hcal, etc.)  A sub detector = a driver DB association

Paulo Mora de Freitas5 Mokka, other geometry features  “Scaling”, the user is able to modify the model's main parameters at launch time To easily be able to study different detector options, like TPC size, number of layers in calorimeters, etc.  “Cooking”, the user is able to modify the model ingredients at launch time To easily be able to study different detector technologies, like analogical versus digital Hcal, etc.

Paulo Mora de Freitas6 6 Scaling  Example : /Mokka/init/globalModelParameter TPC_outer_radius 800

Paulo Mora de Freitas7 Cooking  Example : /Mokka/init/EditGeometry/rmSubDetector SHcal01

Paulo Mora de Freitas8 Parameters in Mokka DB  Parameter values are overwritten by the sub_detector default, then the model_parameter default, then steering file value if any, and finally by the environment value if modified at run time by a previous driver.  Scaling follow the model build_order in ingredients

Paulo Mora de Freitas9 Geometry has to be shared Generator Detailed simulation Reconstruction Analysis Need to share the same geometry !!! And nobody never tried to retrieve geometrical information via SQL queries, except in the geometry drivers in MOKKA !!!

Gabriel Musat L.L.R. – Ecole polytechnique

Paulo Mora de Freitas11 About CGA  Good features in CGA: Provides a full consistent geometry system for simulation, reconstruction and analyses. Provides a scan mechanism to explore the detector geometry and material proprieties (geantino tracking)  But… Links against Geant4 libraries Exports only low level geometry (G4 volumes level) a few users only  Available with Mokka since 2004, anyway

Paulo Mora de Freitas12 ILD Current framework Generator GEAR Geometry API for Reconstruction Analysis Recon- struction Simulation LCIO Persistency Framework MOKKA MARLIN Java, C++, Fortran Geometry Database

13 Improvements from GearCGA  Usual GEAR properties (detector parameters) now available without having to previously run Mokka to generate the GEAR file  together with the Point+Distance Properties  information is now supplied by the CGA interface  the libraries belonging to Mokka, Geant4, CLHEP, MySQL, GEAR, LCIO are put together in one library after linking Mokka Gabriel Musat L.L.R. – Ecole polytechnique

Paulo Mora de Freitas15 Towards a new geometry tool MOKKA history rises a set of user’s requirements for the Geometry Toolkit To be generic, flexible and friendly for the final user, etc. To adopt a CAD graphic interface: No more script language neither XML edited by hand See

Paulo Mora de Freitas16 Towards a new geometry tool Abstraction levels for the detector geometry: To cope with the different views for simulation, reconstruction, analysis, event displays… To use metadata to describe the abstraction levels, to keep the tool as generic as possible To provide a Data Manipulation Language (DML)? To define an abstract API (C++, Java, etc.) To provide at least one implementation for this API To provide at least one simulation/ reconstruction / event display chain compliant with it.